2024-07-31 ペンシルベニア州立大学(PennState)
<関連情報>
- https://www.psu.edu/news/eberly-college-science/story/how-duplicated-genomes-helped-grasses-diversify-and-thrive/
- https://www.nature.com/articles/s41467-024-47428-9
イネ科植物における全ゲノム重複の系統学的プロファイルと、主要なイネ科植物系統間における重複の保持と消失の差のランドスケープ Phylogenomic profiles of whole-genome duplications in Poaceae and landscape of differential duplicate retention and losses among major Poaceae lineages
Taikui Zhang,Weichen Huang,Lin Zhang,De-Zhu Li,Ji Qi & Hong Ma
Nature Communications Published:17 April 2024
DOI:https://doi.org/10.1038/s41467-024-47428-9
Abstract
Poaceae members shared a whole-genome duplication called rho. However, little is known about the evolutionary pattern of the rho-derived duplicates among Poaceae lineages and implications in adaptive evolution. Here we present phylogenomic/phylotranscriptomic analyses of 363 grasses covering all 12 subfamilies and report nine previously unknown whole-genome duplications. Furthermore, duplications from a single whole-genome duplication were mapped to multiple nodes on the species phylogeny; a whole-genome duplication was likely shared by woody bamboos with possible gene flow from herbaceous bamboos; and recent paralogues of a tetraploid Oryza are implicated in tolerance of seawater submergence. Moreover, rho duplicates showing differential retention among subfamilies include those with functions in environmental adaptations or morphogenesis, including ACOT for aquatic environments (Oryzoideae), CK2β for cold responses (Pooideae), SPIRAL1 for rapid cell elongation (Bambusoideae), and PAI1 for drought/cold responses (Panicoideae). This study presents a Poaceae whole-genome duplication profile with evidence for multiple evolutionary mechanisms that contribute to gene retention and losses.
